package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * @author GRS
 * @since 2024/4/27 下午9:59
 */
@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService
{
    @Resource
    private ShoppingCartService shoppingCartService;

    @Resource
    private UserService userService;

    @Resource
    private AddressBookService addressBookService;

    @Resource
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     */
    @Override
    public void placeOrder(Orders orders)
    {
        // 获取当前登录用户
        Long userId = BaseContext.getCurrentId();

        // 查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper
            .eq(ShoppingCart::getUserId, userId);

        List<ShoppingCart> shoppingCartList = shoppingCartService.list(wrapper);

        if (shoppingCartList == null || shoppingCartList.isEmpty())
            throw new CustomException("购物车为空，不能下单");

        // 查询用户数据
        User user = userService.getById(userId);

        // 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null)
            throw new CustomException("用户地址信息有误，不能下单");


        // 向订单表插入一条数据
        Long orderId = IdWorker.getId();
        SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetailList = shoppingCartList
            .stream()
            .map(item ->
            {
                OrderDetail orderDetail = OrderDetail
                    .builder()
                    .orderId(orderId)
                    .number(item.getNumber())
                    .dishFlavor(item.getDishFlavor())
                    .dishId(item.getDishId())
                    .setmealId(item.getSetmealId())
                    .name(item.getName())
                    .image(item.getImage())
                    .amount(item.getAmount())
                    .build();
                amount.addAndGet(
                    item
                        .getAmount()
                        .multiply(
                            new BigDecimal(item.getNumber())
                        )
                        .intValue()
                );
                return orderDetail;
            })
            .toList();

        orders.setNumber(orderId + "");
        orders.setId(orderId);
        orders.setOrderTime(SDF.format(System.currentTimeMillis()));
        orders.setCheckoutTime(SDF.format(System.currentTimeMillis()));
        orders.setStatus(2);
        // 总金额
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(
            (addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName()) +
            (addressBook.getCityName() == null ? "" : addressBook.getCityName()) +
            (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName()) +
            (addressBook.getDetail() == null ? "" : addressBook.getDetail())
        );

        this.save(orders);

        // 向订单明细表插入数据
        orderDetailService.saveBatch(orderDetailList);

        // 清空购物车数据
        shoppingCartService.remove(wrapper);
    }
}